Virtualbox 4.3.4 is not detected as a compatible version

[dajoen]

After upgrading Virtualbox to 4.3.4 on a cygwin Windows 8 installation, vagrant up states the following:

Vagrant has detected that you have a version of VirtualBox installed
that is not supported. Please install one of the supported versions
listed below to use Vagrant:

4.0, 4.1, 4.2, 4.3

I've looked through the code, and don't know why this is happening. Just a beginner at Ruby programming so I might be missing something obvious But it seems to me that every version beginning with 4.3 should be fine for the 4.3 driver.

Same error if I run vagrant up without cygwin.

Downgrading back to 4.3.2 fixes the situation.

[mitchellh]

VirtualBox has a bug on Windows where VBoxManage sometimes doesn't return the version. Master contains a "fix" that retries this a few times.